Signal transduction is part of a cell\'s response to an external signal. although signal transduction pathways can differ in their details, there are some common elements. determine which of the statements below accurately describe signal transduction pathways. select the six correct statements.

The accurate statements to the signal transduction pathways are as follows:

1. A receptor changes conformation upon attachment, conducting a signal across the cell membrane.

2. A second messenger may carry a signal from the cell membrane to an organelle.

3. Signal transduction cascades, often involving protein kinases, amplify a signal intracellularly.

4. A receptor may pass on a signal by associating with another protein or by functioning as an enzyme.

5. A ligand, like hormone, combines with a specific cell surface receptor on a target cell.

6. Phosphatase eradicate phosphoryl groups from polypeptides, monitoring the response of the cell.

oxygen = 21% of the atmosphere

nitrogen = 78%

carbon dioxide = 0.1%

argon =0.934%

the two answers are a, the population of birds with large beaks will increase on the island, and c, the trait for large beaks will be passed on to future generations through natural selection. the reason for that is because if the birds that have beaks developed for eating small seeds lose all of their food, they will go hungry and eventually starve because they physically cannot eat the large seeds, therefore making the population of large beaked birds higher. also, if the trait of large beaks are dominant on the island over small beaks, then over time the large beaked birds will reproduce more and more, while the smaller beaked birds will reproduce less and less because they can't survive with the food provided. that leads to the trait of small beaks disappearing and the trait of large beaks taking over the island.